CLI

CLI (short for "CLear Interrupt flag") is the mnemonic for a machine language instruction which clears the interrupt flag, so that the CPU will respond to IRQ interrupt events. To disable the response to IRQs, use the complementary instruction SEI.

Addressing mode

Opcode		Addressing mode	Assembler format	Length in bytes	Number of cycles
Dec	Hex
88	58	Implied	CLI	1	2

CLI only supports the Implied addressing mode, as shown in the table at right.

CPU flags

CLI affects no processor status flags other than the interrupt status flag.